The concept

The system does not measure the actual inflation pressure in the tires.

It detects a pressure loss in a tire by comparing the rotational speeds of the individual wheels while moving.

In the event of a pressure loss, the diameter and therefore the rotational speed of the corresponding wheel change. This is detected and reported as a flat tire.

    See also:

    Units of measure
    You can change the units for fuel consumption, route/distance, temperature and pressure. 1.  "Settings" 2.  "Language/Units" 3.  Select the desired menu item. ...

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    For 520i and 528i: Check oil level
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